Gin-saw-gumming machine



(No Model.)

J. W. SMITH. GIN. SAW GUMMING MACHINE.

No. 437,628. Patented Sept. 30, 1890.

- in]: era/T5 Y' UNITED STAT-Es PATENT l O FICE.

JEREMIAH W. SMITH, OF ATHENS, GEORGIA.

GIN-SAW-GUMMING MACHINE..

SPECIFICATION forming part of Letters Patent No. 437,628, dated September 30, 1890.

Application filetl February 24, 1890. Serial No. 341,619. (No model.)

To all whom it may concern:

Be it known that I, JEREMIAH W. SMITH, a

citizen of the United States, and a resident of Athens, in the county of Clarke and State of Georgia, have invented certain new and useful Improvements in Gin-Saw Gummers; and Ido hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same,'r'eferenee being had to the accompanying drawings, and to letters of reference marked thereon, which form part of this specification.

This invention relates to the class of sawgummers in which acircular abrading-instrumachine and a saw to which it is applied.

Fig. 2 is a front elevation of the machine, showin g the face of the file, the lateral adjustment, and many other details. Fig. 3 is a vertical section through the machine on the line 0c 00, Fig 4. Fig. 4 is a plan of the machine, showing most of its details. Fig. 5 is an enlarged front view of the file or circular cutter,

the milling-teeth on its edge being shown in only a portion. of its circumference. is an edge view of the cutter, also showing a portion of its shaft.

In the figures, like reference-marks indicating corresponding parts in the several views, A is a base, on which rests the frame B, that is adjustable thereon in every horizontal direction by the screws a and b. The shaft 0 of the gear 0 is journaled on the frame B, and on this shaft is pivoted the verticallyswinging frame D, carrying the shaft of the pinion E, to which is also attached the cutter F. On the round bar Gr, that passes through the frame B, are pivoted the feed-leverH and the lever K, that raises the cutter out of each tooth after it is finished. These levers are operated by the eccentrics h and lo, respectively, through the pitmen h and it, having Fig. 6

strap-connection with the eccentrics and by the hinged sleeves h and k with the levers H and K. The sleeves h" and k" are adjustable lengthwise on the levers H and K for the purpose of regulating their throw ontheir' forward ends. To the lever H is attached the feed-pawl H. The feed-plate H", attached to the pawl H by the screws I, is made thin on the working edge to cause it to enter the interdental spaces, and is adjustable by the screw 1 to cause the saw to be fed forward each time, so that the file or cutter F will enter and do its work between the teeth, as will be hereinafter explained. To cause the pawl H to take one tooth and no more at On the base A is the forwardly-projecting bifurcated arm L, that enters between the saws and bears against the space-blocks, as shown, the forked shape of this arm insuring the correct location and steadiness of the front end of the machine, while the base should rest on a bench or trestle of such a height as to make the machine approximately level. The cutter F should be so placed as to be central over one side of the arm L, and the cutter should rotate in the direction that will cause the half that is directly over said arm to move downwardly. This will cause the cutter, when the machine is constructed as shown, to operate on the saw that is on the left of the bifurcated arm and in the direction that will push the saw away from the said arm. the adjustable arm M is pivoted and attached To resist the thrust of the cutter,

by a bolt through the slot m to the frame B,

It will be observed by reference to Fig. 6 that the cutter is fiat on one side and beveled on the other, and that the frame by which it is carried is pivoted on a level with its axial line, in order thatboth sides of the cutter may have an inclination to its line of movement, which line is circular, the central point being the shaft 0. This arrangement also causes the gearing, the pinion E being carried'by the frame B, to work correctly wit-hout reference to the inclination or depression of the cutter.

The teeth f are around the edge of the cutter, a few of which are shown in Fig. 5 and 15.

are in form like the teeth of a milling-cutter, are intended to mill in the bottom of the space between the teeth, while the file-teeth f which are on both sides of the cutter, form and smooth the top and bottom edges of the teeth. To cause the cutter to do its work at a diiferent point on its circumferential surface at each of its revolutions to prevent all the wear coming in one place, the gearing is so proportioned that the pinion cannot be exactly multiplied into the larger gear, preferably missing by one tooth only, by reason of which, the feed-eccentrics being on the shaft of the larger gear, the cutter will not make an exact number of revolutions at each revolution of the feed-cams. The frame D, being pivoted on the frame B and carrying the cutter F,is lifted at each revolution of the shaft 0, while the saw is being moved forward by means of the cam is, pitman k, sleeve k, lever K, and connecting-rod K. The rorl K has a pivotal connection, as shown, to the lever K and the frame B, the length between said pivotal points being governed by the distance which the screw-rod K is screwed into the pivot 10, and the downward pressure of the cutter on the saw is imparted thereto by the spring 10, which bears on the frame D by contact with the washer n, which lies across the slot through which passes the rod K, and at its other end bears on the nut N, which operates on the thread on the upper end of the said rod K. The time at which the cutter will re-enter the tooth is regulated by setting the cam is on the shaft 0.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. The combination of the base A, the bifurcated arm L, projecting from said base, the adjustable frame B, supported by said base, the cutter F, the arm carrying said cutter and hinged to said frame, and the mechanism for rotating said cutter, substantially as shown and described.

2. In a gin-saw-gumming machine, the combination of the supporting-frame B, the shaft 0, journaled therein, the pitman h, eccentrically journaled on said shaft, the lever H, pivoted to said frame and connected with said pitman, and the pawl H, operated by said lever, substantially as specified.

3. In a gin-saw-gumming machine, the combination of the supporting-frame B, the shaft 0, journaled therein, the pitman h, eccentrically journaled on said shaft, the lever H, pivoted to said frame and adj ustably connected with said pitman, the pawl H, operated by said lever, and the plate H, adjustably attached to said pawl, substantially as specified.

4. In a gin-saw-gumming machine,the combination of the supporting-frame B, the shaft 0, journaled therein, the cutter F, the arm carrying said cutter and hinged to the said shaft, and the mechanism for intermittently raising and lowering said arm, substantially as and for the purpose specified.

5. In a gin-saw-gumming machin e,'the combination of the supporting-frame B, the shaft 0, journaled therein, the cutter F, the arm hinged to the shaft 0 and carrying said outter, the pitman k, eccentricallyjournaled on said shaft, the lever K, pivoted to said frame and connected with said pitman, and the screw-rod K, connecting the free end of the lever with the cutter-arm, substantially as and for the purpose specified.

(3. In a gin-saw-gumming machine, the combination of the frame B, the cutter F, the arm hinged to the said frame and carrying the said cutter, the mechanism for intermittently raising and lowering said arm, and the mechanism for intermittently rotating the saws, substantially as specified.

7. In agin-saw-gumming machine, the combination of the base A, the bifurcated arm L, projecting from said base, the adjustable frame B, carried by said base, the arm M, projecting from said frame, and the gumming mechanism carried by said frame, substan-' tially as shownand described. y

In testimony whereof Ihereunto afifix my signature in presence of two witnesses.

' JEREMIAH W. SMITH.

Witnesses:

RoBT. B. PORTER, Z. O. HAYES. 

